i'm in the mcdonough area (45 minutes south of downtown off I-75).
I have never run that wide a tire on the front. I can imagine it might be a pain. I was happy with the 275/35/18s on the front (although 315s would look bad ass, in my opinion), but the 275s were already nearly rubbing on the factory strut which didn't even have a coilover set up. I absolutely want to run a coilover set up so I can have that ability to adjust the ride height easily. When I had the 275s on the front before I started the project, they were nearly sticking out the wheel well. Now that the rear are tucked in with a 1/2" of clearance, I don't want the front to stick out noticably farther. The new wheels do have a 1/2" more backspace which I suppose I could add a spacer and make it work same as before, but would rather have them sit under the car with the same clearance as the rear. I wouldn't want to go smaller than the 275. I think it makes a real difference in the stance with the 345s in the rear.
thus i started this thread to consider my options. increasing backspacing combined with a spring over the strut equals about at least 1" of interference.
although its a street car, it will be mainly a weekend driver, some strip, and maybe a few attempts at a little road racing.
if i could do it again, i would have started with a GT and not an original cobra, but it wasnt stock when i got it, and it was clean. no turning back now.

ohh well. I have seen some 66-70 stangs with the MII upgrade and a 4.6 mod motor. looks tight, but can be done from what I can tell. I am sure my header fabrication skills will surely be tested in that tight of quarters.
thanks,
michael